When
            you're finished working on a single composition, you can close it.
         
         NoteIf there are multiple
               versions of the same composition open, there is no way to close
               them all in one operation.
            
         To close a composition:
         
         
            - If the composition is not selected, in
               the taskbar, click the name of the current composition (to the right
               of the composition icon) and then select the composition you want
               to close. 
               Alternatively, in a File
                  Browser, click the composition you want to close. 
                
- Select Composition > Close or press Ctrl + W(for Windows or Linux) or Cmd + W(for Mac OS).
            
Things
               to Remember
         
            -  All open compositions are automatically
               closed when you exit. You cannot keep a composition open between
               sessions.